Bursting Strength Testing: Purpose, Process, and Applications

What is a Bursting Strength Tester?

A bursting strength tester is an instrument used to measure the resistance of materials to rupture or burst. This test is applicable to a wide range of materials including paper, paper boards, corrugated boards and boxes, solid fibre boards, filter cloth, industrial fabrics, and leather. These tests are crucial for assessing the quality, durability, performance, and strength of the materials, ensuring they meet specific standards and requirements.

How is Bursting Strength Measured?

Burst strength is quantified in kilograms per square centimetre (kg/cm²). To calculate the burst factor of a corrugated or flexible package, the burst strength and the grammage (density) of the packaging material are used. The formula considers both the material's burst strength and its density to provide a comprehensive measure of its durability.

How to Perform a Burst Strength Test?

The burst strength test is conducted using the following steps:

1. Sample Placement: Position the sample on top of a film within the testing machine.
2. Clamping: Secure the sample with a sample holder to keep it in place.
3. Pressure Application: Apply pressure evenly to the sample, allowing it to protrude with the film.
4. Observation: Continue applying pressure until the sample ruptures.
5. Measurement: Record the maximum value of the applied hydraulic pressure, which is the bursting strength of the sample.

This process ensures a precise measurement of the material's resistance to bursting under controlled conditions.

What is a Burst Tester?

A burst tester is a device used in burst pressure testing, a type of destructive test. This test determines the absolute maximum pressure at which a component will burst, fail catastrophically, or begin to deform plastically. By pressurising the material under controlled conditions, the burst tester identifies the material's limits, providing critical data on its performance and safety.

Conclusion

Bursting strength testing is essential for evaluating the quality and durability of various materials used in packaging and industrial applications. By understanding and applying the principles of burst strength testing, manufacturers can ensure their materials meet required standards and perform reliably under stress.